Acrobat Reader DC

Please excuse my post as i am somewhat computer illiterate.

My work recently upgraded to my PC and i am struggling to get my pdf reader to work as it used to.

The old version of pdf reader that i used allowed me to open several pdf's in one window, ie it was separate tabs on one window. The new version i have opens each pdf in its own window. Is there a setting i can change to make them all open as tabbed viewing as i cant seem to find anything.

I also can no longer click on the document and drag it like i used to. Now when i click and drag it just puts a box on the document. Is there some way of changing this so i can drag the document instead of scrolling with the mouse or using the slide bar on the right side of the screen.